Rails 3：“accepts_nested_attributes_for:reject_if”不起作用

Question

我的UserQuestion model 有许多accepted_answers 并接受嵌套属性：accepted_answers

    accepts_nested_attributes_for :accepted_answers, :reject_if => lambda { |a| ( a[:answer_id] == 0) }, :allow_destroy => true

我的表单发送以下参数：

   "accepted_answers_attributes"=>{"0"=>{"answer_id"=>"0"}, "1"=>{"answer_id"=>"25"}, "2"=>{"answer_id"=>"0"}}

我想我的问题是，lambda 设置不正确，因为即使它们的 answer_id 为 0 也会创建已接受的答案

Answer 1

尝试这个：

:reject_if => lambda { |a| ( a[:answer_id].to_i == 0) }